Home / 84,153.12-116,089.92-78,151.20

Finding the Fourth Proportional to 84,153.12, 116,089.92 and 78,151.20

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Solution

The fourth proportional to 84,153.12, 116,089.92 and 78,151.20 is: 107,810.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,153.12 : 116,089.92 = 78,151.20 : x
  2. Step 2: Convert to fraction form
    84,153.12/116,089.92 = 78,151.20/x
  3. Step 3: Cross multiply
    84,153.12x = 116,089.92 × 78,151.20
  4. Step 4: Simplify right side
    84,153.12x = 9,072,566,555.90
  5. Step 5: Solve for x
    x = 9,072,566,555.90/84,153.12
  6. Step 6: Final answer
    x = 107,810.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.